参数资料
型号: AD7328BRUZ-REEL
厂商: Analog Devices Inc
文件页数: 18/37页
文件大小: 0K
描述: IC ADC 12BIT+SAR 8CHAN 20-TSSOP
设计资源: Using AD7328 in Appls with Single-Ended Industrial-Level Signals (CN0047)
标准包装: 2,500
系列: iCMOS®
位数: 12
采样率(每秒): 1M
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
功率耗散(最大): 30mW
电压电源: 双 ±
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 20-TSSOP
包装: 带卷 (TR)
输入数目和类型: 8 个单端,单极;8 个单端,双极;4 个差分,单极;4 个差分,双极
AD7328
Data Sheet
Rev. C | Page 24 of 36
SEQUENCE REGISTER
The sequence register on the AD7328 is an 8-bit, write-only register. Each of the eight analog input channels has one corresponding bit in
the sequence register. To select a channel for inclusion in the sequence, set the corresponding channel bit to 1 in the sequence register.
MSB
LSB
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Write
Register Select 1
Register Select 2
VIN0
VIN1
VIN2
VIN3
VIN4
VIN5
VIN6
VIN7
0
RANGE REGISTERS
The range registers are used to select one analog input range per analog input channel. Range Register 1 is used to set the ranges for
Channel 0 to Channel 3. It is an 8-bit, write-only register with two dedicated range bits for each of the analog input channels from Channel 0 to
Channel 3. There are four analog input ranges, ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V. A write to Range Register 1 is selected by setting the
write bit to 1 and the range select bits to 0 and 1, respectively. After the initial write to Range Register 1 occurs, each time an analog input
is selected, the AD7328 automatically configures the analog input to the appropriate range, as indicated by Range Register 1. The ±10 V
input range is selected by default on each analog input channel (see Table 13).
MSB
LSB
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Write
Register Select 1
Register Select 2
VIN0A
VIN0B
VIN1A
VIN1B
VIN2A
VIN2B
VIN3A
VIN3B
0
Range Register 2 is used to set the ranges for Channel 4 to Channel 7. It is an 8-bit, write-only register with two dedicated range bits for
each of the analog input channels from Channel 4 to Channel 7. There are four analog input ranges, ±10 V, ±5 V, ±2.5 V, and 0 V to +10 V.
After the initial write to Range Register 2 occurs, each time an analog input is selected, the AD7328 automatically configures the analog
input to the appropriate range, as indicated by Range Register 2. The ±10 V input range is selected by default on each analog input channel
MSB
LSB
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Write
Register Select 1
Register Select 2
VIN4A
VIN4B
VIN5A
VIN5B
VIN6A
VIN6B
VIN7A
VIN7B
0
Table 13. Range Selection
VINxA
VINxB
Description
0
This combination selects the ±10 V input range on VINx.
0
1
This combination selects the ±5 V input range on VINx.
1
0
This combination selects the ±2.5 V input range on VINx.
1
This combination selects the 0 V to +10 V input range on VINx.
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